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7d9794e752
linux/arch/sh
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Peter Zijlstra 7d9794e752 locking/atomic, arch/sh: Implement atomic_fetch_{add,sub,and,or,xor}() 
Implement FETCH-OP atomic primitives, these are very similar to the
existing OP-RETURN primitives we already have, except they return the
value of the atomic variable _before_ modification.

This is especially useful for irreversible operations -- such as
bitops (because it becomes impossible to reconstruct the state prior
to modification).

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-06-16 10:48:29 +02:00
..
boards This is the bulk of GPIO changes for kernel cycle v4.7: 2016-05-17 17:39:42 -07:00
boot kbuild: delete unnecessary "@:" 2016-04-20 10:36:57 +02:00
cchips genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
configs arch/defconfig: remove CONFIG_RESOURCE_COUNTERS 2016-05-23 17:04:14 -07:00
drivers PCI: Remove unused "pci_probe" flags 2015-07-27 17:09:40 -05:00
include locking/atomic, arch/sh: Implement atomic_fetch_{add,sub,and,or,xor}() 2016-06-16 10:48:29 +02:00
kernel Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-05-25 17:05:40 -07:00
lib sh: New gcc support 2016-03-17 19:45:44 +00:00
lib64
math-emu sh: remove unused do_fpu_error 2014-04-03 16:20:52 -07:00
mm Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-20 19:08:56 -07:00
oprofile
tools
Kconfig lib/GCD.c: use binary GCD algorithm instead of Euclidean 2016-05-20 17:58:30 -07:00
Kconfig.cpu arch/sh: remove depends on CONFIG_EXPERIMENTAL 2013-01-21 14:43:13 -08:00
Kconfig.debug
Makefile sh: also try passing -m4-nofpu for SH2A builds 2014-07-23 15:10:54 -07:00